Răspuns:
Nu mergeam = verb, fs. de predicat verbal.
La intamplare = substantiv, fs. de complement circumstantial de loc.
Precis = adverb, fs. de complement.
De mult = adverb, fs. de complement indirect.
O prăvălie = substantiv, fs. de complement direct.
Imi = pronume personal, fs. de complement direct.
Sper ca te-am ajutat